Which of the following group(s) is/are o- and p-directing?

C N^{-}

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S O_{3} H^{-}

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N H_{2}^{-}

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R C O O^{-}

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Solution

The correct options are
C $N H_{2}^{-}$
D
$R C O O^{-}$

The groups $- ¨ N H_{2}$ and $R C O {¨ O :}^{-}$ have lone pair of electrons which can be donated to a benzene ring and activate it at o- and p-position and thus are $o -$ and $- p$ directing.
On the other hand, the groups $- C N$ and $- S O_{3} H$ are meta directing and deactivating as they are electron withdrawing groups.

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Similar questions

- C O O H, - C N, - N H_{2} - C O C H_{3}, - N H C O C H_{3}, - O H, - C H O, - S O_{3} H, - C l, - N O_{2}

- N H_{2}

The order of -I power (-ve inductive effect ) of the following functional groups will be:

(i) $- S O_{3} H$

(ii) $- C l$

(iii) $- N H_{2}$

(iv) $- H$

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